Everything you need to install your new shocks comes in the box, including new hardware. Some applications will require the use of the factory rear shock bolts. Our shocks were installed on a '97 Chevrolet Silverado 1500 running a Fabtech Motorsports 4-inch suspension lift. The kit on the truck has taken some serious abuse over the years and the shocks were blown a long time ago. The new shocks bolted right in and gave us back that smooth ride we missed from many years ago.